dimensions = (200,50)
print(dimensions[0])
print(dimensions[1])
print("Original dimensions:")
for dimension in dimensions:
    print(dimension)

dimensions = (400,100)
print("\nModified dimensions:")
for dimension in dimensions:
    print(dimension)

print('-------')
#练习4-13
foods = ('米饭','面条','包子','饺子','粥')
for food in foods:
    print(food)

print('-------')
foods = ('米饭','面条','包子','热干面','炒面')
for food in foods:
    print(food)